Fix service issues

LeStorage/Services.swift

@@ -129,6 +129,10 @@ public class Services {
         return try self._baseRequest(servicePath: servicePath, method: .post)
     }
     
+    fileprivate func _putRequest(servicePath: String) throws -> URLRequest {
+        return try self._baseRequest(servicePath: servicePath, method: .put)
+    }
+    
     fileprivate func _getRequest(servicePath: String) throws -> URLRequest {
         return try self._baseRequest(servicePath: servicePath, method: .get)
     }
@@ -161,7 +165,13 @@ public class Services {
     }
     
     public func post<T: Storable>(_ instance: T) async throws -> T {
-        var postRequest = try self._postRequest(servicePath: T.resourceName())
+        var postRequest = try self._postRequest(servicePath: T.resourceName() + "/")
+        postRequest.httpBody = try jsonEncoder.encode(instance)
+        return try await self._runRequest(postRequest)
+    }
+    
+    public func put<T: Storable>(_ instance: T) async throws -> T {
+        var postRequest = try self._putRequest(servicePath: T.resourceName() + "/" + instance.id + "/")
         postRequest.httpBody = try jsonEncoder.encode(instance)
         return try await self._runRequest(postRequest)
     }